A few weeks ago I wrote about sea kayaking on the River Thames.
Now you can hear from the man I was kayaking with, and who could also take you paddling into the heart of London, Harry Whelan.
This is the December podcast, and it's a few days early because I'm going to be working away for much of this week.
The next podcast, coming early January, will be with one of the co-founders of the famous surf kayakers, the Tsunami Rangers.